Removed Java 18 to replace with 17 but still 18 when run.

[Owen Thomas]

Thanks Jeffrey that works. Running java --version now gives me the
following:

openjdk 17.0.5 2022-10-18
OpenJDK Runtime Environment (build 17.0.5+8-Ubuntu-2ubuntu122.04)
OpenJDK 64-Bit Server VM (build 17.0.5+8-Ubuntu-2ubuntu122.04, mixed mode,
sharing)

I did check "which java" I had installed before I installed the OpenJDK 18
package, and nothing was returned. I would have thought that removing the
OpenJDK 18 package would have removed what was installed, but evidently not.

Removing these packages should have been a simple exercise. It was not. I
have had more memorable days as a result.

On Wed, 23 Nov 2022 at 14:49, Jeffrey Walton <noloader at gmail.com> wrote:

> On Tue, Nov 22, 2022 at 9:47 PM Owen Thomas <owen.paul.thomas at gmail.com>
> wrote:
> >
> > My Java project, which uses Gradle 7.4, told me that this version of
> Gradle is incompatible with Java 18. I had a look here and was advised to
> use Java 17. So, I tried to remove Java 18 using "sudo apt remove
> openjdk-18-jdk" followed by "sudo apt install openjdk-17-jdk". When I run
> java --version I get the following result:
> >
> > openjdk 18.0.2-ea 2022-07-19
> > OpenJDK Runtime Environment (build 18.0.2-ea+9-Ubuntu-222.04)
> > OpenJDK 64-Bit Server VM (build 18.0.2-ea+9-Ubuntu-222.04, mixed mode,
> sharing)
> >
> > I have tried to run this in a fresh CLI window, and the results are the
> same,
> >
> > What do I do now?
>
> It looks like you still have the Java Runtime Environment (JRE)
> installed. You should remove it, too.
>
> The package name could be openjdk-18-jre, openjdk-18-jre-headless or
> openjdk-18-jre-zero. So your command might look like:
>
>   $ sudo apt-get remove --purge \
>       openjdk-18-jre \
>       openjdk-18-jre-headless \
>       openjdk-18-jre-zero
>
> This may help identify other interesting OpenJDK 18 packages:
>
>     $ apt-cache search '^openjdk*' | grep '\-18'
>
> Jeff
>
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